Casein glue



atentecl Oct. 26, 1926.

ENT Fl-CE.

No Drawing.

or adhesive by the use of the above noted substances in accordance with the following formula:

-Parts.

Casein 50 to 75 Calcium hydroxide; 10 to 30 Calcium chloride 4 to 10 Calcium tannate. 2 to 8 Sodium fluoride 2 to 8 Tri-sodium phosphate 3 to 15 Castor oil 1 to 4 The above noted substances, except the oil,

2 are commingled in dry or powderform and the oil is in such small quantity that it does not make the powdered massipasty, but, nev-.

ertheless, it is one of its functions to keep the composition from getting into dust form. When the composition is to be used, it=will be introduced into water to form an emulsion, and it is then, of course, that the chemical reactions that develop the adhesive qualities of the composition, will take place.

" After these" reactions have taken place, the emulsion is adapted to be used as a glue or as a coating, or to be commingledwith other substances such as paint or calcimine which contain certain color pigments. When desired, however,- the color-producing pigments may be commingled with the dry'composition. When the composition is to be used as a glue, no additions to the formula,

- except water, will be required. I

Application flledl April 17, 1922. Serial No. {554,189.

1 The colloidal properties of the casein are brought into solution through the action of calcium hydroxide, calcium chloride, sodium fluoride, and tri-sodium phosphate, in con-. tact with ;Water.v Calcium tannate imparts the peculiarity of delaying the setting up process of the glue when applied to the surface of Wood and, being of a vegetablenature, reduces the likelihood of staining the Wood. Calcium hydroxide in combination with casein produces the well known caseinates of lime, which are insoluble, thereby produclng a waterproof glue. Calcium chloride adds to the liquid life of the glue. Tri sodium phosphate retards the formation of ammonia and, in conjunction with sodium fluoride, acts as a solvent for casein. The castor oil can be omitted fromvthe composition'without changing the general character. i

of the same.

What I claim is: 1 1. An'adhesive compositionjmade substantially in accordance with the following formula, to wit:

Parts. Casein 50 to 75 Calcium hydroxide 10'to 30 Calcium tannate 2 to 8- Sodium fluoride l 2 to 8 Phosphate of soda 3 to 15 Chloride of calcium; 4 to 10 75 2. An adhesive composition made in accordance with the-following formula:

Parts. Casein; s 50 to 75 Calcium hydroxide 10 to Calcium chloride 4'to 10' Calcium tannate 2 to .8 Sodiumfluoride' 2 to 8 Tri-sodium phosphate 3 to 15 Castor oil 1 to 4 s5 2 In testimony whereof I atfix my signature.

HENRY LQPBESTHQLDT. 

